We introduce a novel method called constant encoding, which can be used to tamper-proof a software watermark that is embedded in the dynamic data structures of a program. Our novel tamperproofing method is based on transforming numeric or non-numeric constant values in the text of the watermarked program into function calls whose value depends on the watermark data structure. Under reasonable a...

Image authentication and image tamper detection. Double JPEG compression might occur when a portion is cut from an image which may or may not be: Image tamper detection using passive-blind techniques has become a hot research field. It uses non-intrusive methods which uses image functions to detect tampering. The tampering operation changes the inherent statistical properties of an image which ...

This paper presents a fragile watermarking technique to tamper proof (Mocap) motion capture data. The technique visualizes 3D Mocap data as a series of cluster of points. Watermarks are embedded using clusters points, where a bit is encoded in each cluster. The four point encoding mechanism uses a combination of one point encoding and three point encoding schemes. Using these schemes it is poss...

A seal is only as good as the man in whose briefcase it's carried. —KAREN SPÄRCK JONES 12.1 Introduction Many computer systems rely to some extent on secure printing, packaging, and seals to guarantee important aspects of their protection. • Many software products get some protection against forgery, using tricks such as holographic stickers that are supposed to tear when removed from the packa...

Recently enterprises and corporations have reported several incidents of leakage of sensitive data and plagiarism of copyrighted information on the Web. We address the Bulk Document Leakage (BDL) problem: Given a large set of sensitive or copyrighted documents in an enterprise, determine if a portion of the document set has leaked (or has been plagiarized) and been published on the Web. An adve...

Most of digital watermarking algorithms have been designed for only single purpose. In this paper, a new multipurpose oriented stereo image watermarking algorithm is proposed for three dimensional multimedia, which can be used for copyright protection, content authentication and tamper detection in three dimensional (3D) multimedia. Specifically, host stereo image is divided into non-overlappin...

A non-malleable encoding scheme is a keyless encoding scheme which is resilient to tampering attacks. Such a scheme is said to be continuously secure if the scheme is resilient to attacks containing more than one tampering procedure. Also, such a scheme is said to have tamper-detection property if any kind of tampering attack is detected. In [S. Faust, et al., Continuous nonmalleable codes, TCC...

We present FaceCerts, a simple, inexpensive, and cryptographically secure identity certification system. A FaceCert is a printout of person’s portrait photo, an arbitrary textual message, and a 2-D color barcode which encodes an RSA signature of the message hash and the compressed representation of the face encompassed by the photo. The signature is created using the private key of the party is...

It is relatively easy to build an encryption system that is secure if it is working as intended and is used correctly but it is still very hard to build a system that does not compromise its security in situations in which it is either misused or one or more of its sub-components fails (or is ’encouraged’ to misbehave) . . . this is now the only area where the closed world is still a long way a...